####018005456#### ACUS44 KWBC 210257 SCCNS4 Storm Summary Number 2 for Heavy Rainfall and High Wind Associated with Tropical Storm Hilary NWS Weather Prediction Center College Park MD 800 PM PDT Sun Aug 20 2023 ...Widespread heavy rainfall and strong winds to occur from Southern California and the Great Basin tonight to portions of the Northern Rockies into Monday morning as Hilary tracks north... Tropical Storm Warnings are in effect over Southern California (including the San Diego and Los Angeles metropolitan areas). Flash Flood Warnings are in place throughout much of Southern California. Flood Watches extend across Southern California northward into the Great Basin and interior Northwest. High Wind Warnings extend across portions of the Mojave and Sonoran Deserts northward into the Great Basin and Northern Rockies. For a detailed graphical depiction of the latest watches, warnings and advisories, please see www.weather.gov At 700 PM PDT...Latest surface observations and regional radar mosaic depict widespread moderate to heavy rainfall across much of Southern California northward into the Great Basin. Heavy showers have also been detected over central Arizona and as far north as the Snake River Valley. The expansive shield of rainfall is occurring ahead of Tropical Storm Hilary, analyzed by the National Hurricane Center with a position of 33.6N, 117.1W. Note: rainfall observations for California and Arizona were collected beginning this Friday at 7 AM PDT, while observations over Nevada were collected starting Saturday at 7 AM PDT. ...Selected preliminary Storm Total Rainfall in inches from 700 AM PDT Fri Aug 18 through 700 PM PDT Sun Aug 20... ...ARIZONA... YELLOW JOHN MOUNTAIN 1.33 MUSIC MOUNTAIN 1.15 PARKER 1.11 YUMA PROVING GROUND 0.79 PLEASANT VALLEY 0.73 ...CALIFORNIA... MT. SAN JACINTO 8.52 ELEVATION 8616FT HEART BAR 6.91 ELEVATION 6690FT MT LAGUNA 6.88 ELEVATION 6000FT RANCHITA 6.78 ELEVATION 4180FT RAYWOOD FLATS 6.77 ELEVATION 7079FT LEONA VALLEY 6.15 WRIGHTWOOD 5.50 ELEVATION 5950FT UPPER TAHQUITZ CREEK 5.12 ELEVATION 5600FT PHELAN 1 W 4.39 WALKER PASS 4.19 ELEVATION 5572FT PINE MOUNTAIN CLUB 3.75 BIG BEAR CITY 3 ENE 3.59 ...NEVADA... BRISTLECONE TRAIL 6.00 ELEVATION 8906FT LEE CANYON 4.80 ELEVATION 8618FT RAINBOW CANYON 3.40 YUCCA MOUNTAIN 2.81 KYLE CANYON 2.01 ASH MEADOWS 2.00 ...Selected preliminary Peak Wind gusts in miles per hour earlier in the event... ...ARIZONA... YUMA ARPT 69 SAFFORD 4 ENE 60 BENDER SPRINGS 59 MOBILE 2.2 SE 47 GILA BEND 46 ...CALIFORNIA... BIG BLACK MOUNTAIN 84 ESSEX 10 SSE 83 OLD WOMAN MOUNTAIN PALOMAR MTN LOOKOUT 79 PIGSAH PEAK 79 HAUSER MOUNTAIN 78 VALLEY CENTER 7 E 70 CRESTLINE 5 NW 69 SANTA CLARITA 10 ESE 64 ELEVATION 4483FT THOUSAND OAKS 8 SW 57 BONEY MOUNTAIN OCEANSIDE 5 NW 52 CAMP PENDLETON Tropical Storm Hilary is forecast to continue its track north into the heart of the Great Basin tonight. Even after Hilary becomes a post-ropical storm, its remnant moisture will still be responsible for rounds of heavy rainfall and high wind gusts throughout the West on Monday. For more information regarding the track of Hilary, refer to the National Hurricane Center at nhc.noaa.gov. Potentially historic rainfall is expected to cause additional flash, urban, and arroyo flooding across the Southwestern U.S. Dangerous to locally catastrophic flooding impacts are expected through Monday morning. Flash flooding is also anticipated across portions of the interior Northwest through Monday and Tuesday. For more information regarding the excessive rainfall associated with Tropical Storm Hilary, please visit wpc.ncep.noaa.gov. The next Storm Summary will be issued by the Weather Prediction Center at 800 AM PDT. Please refer to your local National Weather Service office for additional information on this event. Mullinax $$